Insulator support



A ril 2, 1929. R. H. MANSON" 1,707,558

INSULATOR SUPPORT Filed July 1926 F ll3.1.

. as secondary racks such as are-commonly used Patented Apr. 2, 1929.

UNITED STATES moms PATENT OFFICE! eaten a. MANSON, or 'PI'ITSB'URGH, rnnnsnvnma; ASSTGROR "r0 numanm'm commxw, A CORPORATION or rnnnsnvanm.

insina'ron scream.

Application filed July 8,

I This invention relates to insulator supports and more particularly to the type known iormounting a row of insulators upon a support-ing wall, ole or the hke.

Supports o this type generally consistof a base section by means of which the device is secured to the supporting structure and on which are mounted a plurality of separately formed,-outwardl y extending insulator supportingarms, the latter being of a configuration dependent upon the particular type of insulator to be supported. 7

It has heretofore been customary to form the arms separately andsecure them to a base section, which itselfmay be formed by one or more parts, by any suitable manner of fastening such, for example, as riveting.

It isapparent that this form of construction issubject'to serious defectsfrom the commercial viewpoint, there being, among others,

the cost and'timeof-manufacturing, due to the necessity of :assemblingthe various separate parts and positioning t em securely together. The strength of such devices is-always large- ,ly dependent upon the strength of the particular fastening meansemployed rather than upon the-design and constructionof the completed rack.

An ob'ect of this invention is to provide an improved method of manufacturing insulator supports of the type set forth. I u V 'A further object is to provide a method of manufacturing devices of the type set forth from a single piece of metal.

A still further object is to provide a secondary rack which is formed from a single piece of metal and which eliminates objectionable features in the prior art racks known to me.

These and other objects which will be obvious to those skilled in this particular art are attained by means of this invention, one form of which is illustrated in the accompanying drawings, in which Figure 1 is a front elevation of a blank which has been formed from stock, such as sheet metal. Fig. 2 is a view in side elevation of the blank after being bent to form a finished rack and Fig.3 is a section on the line 3-3 of Fig. 2, showing one of the insulator supporting arms in plan. 7

In applying the invention to the manufac ture of the particular kind of supporting rack illustrated, a flat strip of sheet metal stock is 1926. 'flerial'io. 180,427.

blanked out, preferablybystamping, to pro vide a blankof the form shown in Fi 1,-hav ing parallel side members connected %y a. rality of integral cross arms. The blank flhus' formedis seen to be symmetrical andoneaxis.

cut to form a flat blank 5 having the con figuration shown in Fig. 1. The blank includes parallel side members 6 connected by a numberfof integral spaced cross arms '1. Each.

cross arm has central notches 8 which form .a central relatively narrow section 9 between relative wide sections 10 whiehtaper gradually toward the side-members 6. Slots 11 are punched adjacent theedges ef theside mam hers 6 preferably, but not necessarily, at the timethe blank is stampedf-rom thesheetnmterialthe I It is obvious am an inspection of Fig.1.

that the blankis symmetrical with-reaped to the medial line drawn through the centers of the narrow sections 9 parallel to' the side edges of the blank. The blank is next pressed in a forming die which bends the side members 6 downwardly along the dotted lines 13 to form right angle base flanges 12 and preferably at the same operation bends the edges of the wide portions 10 of the connecting arms upwardly along the dotted lines 14 to form'top and bottom flanges 21 on the connecting arms.

tions 9 of each connecting arm until the edges 21 of the flanges 21 of one side butt against The blank is next formed 2 about a-mandrel engaging the central sec the edges 21' of the flanges 21 of the outer.

side. This produces a substantially smooth surface on thetops and bottoms of the insulator supporting armsso that line wires can be dragged thereacross during the operation of stringing the wires without any danger of their bein abraded by sharp ed es on the arms. In riding the edges of wi e portions 10 as described the edges of the slots 8 are so positioned that theycooperate with the narrow sections 9 to form openings in the outer ends of each of the finished arms for receivin the usual pin 16 on which the insulators 1( are mounted. One such insu lator is shown broken away in Fig. 2. The

blank is finished by securing the bent edges 21 together, preferably by spot welds 18 as illustratedin Fig. 3 or in any other desired manner.

Thefinished article comprises an insulator rack having a base section 19 formed by the 1 flanged side members of the original blank and provided with outwardly extending insulator arms QOwhich are. an integral part of the supporting base and which preferably tapergradually from their outer enns to the base. Being formed from a single piece of ,metal there are no fastening means and no r moisture can collect and set up a galvanic acseparate parts to become loosened so as to render the rack unusable.

tion to destroy the galvanized coating where such coating is employed. v

Although I have described a Ptll'tlCllldPSQ- riesof steps for manufacturing a single form of insulator support, it will be obvious that various changes, omissions, additions or substitutions can be made therein without departing from the spirit of this invention or the scope of the, appended claims.

The present .method materiallyincreases the rapidity of lWhat I claim as new and desire to secure by Letters Patent is:

1. The method of manufacturinginsulator supports which consists in providing a blank having longitudinally extending side members connected by a plurality of integral con nccting arms, and bending the blank to form an insulator supporting rack.

2. The method of manufacturing insulator supports which consists in forming a blank having side members connected by a plurality of integral connecting arms, bending the blank about the centers of said arms sothat said side members are adjacent each other to form a base section having a plurality of insulator supporting arms integrally formed thereon. e r I 3. The method of mainlfacturing insulator supports whichconsistsin stamping a metal sheet to form a synnnetrical blank having side members joined by a number of inte ral cross arms, bending theb'lank along one axis of symmetry until said side members are adjacent each other and Hanging the side members to form a base having a plurality of out-- wardly extending arn'is I 4; The method ofv manufacturing insulator supports which consistsinstamping a metal sheet to'form asymmetrical blanlchaving side members joined by a number ofgintegral cross arms-bending the blank along oneaxis of symmetry until said side members are ad: j acent each other, flanging t-he side members to form abase having a pluralityof outwardly extending arms and bending the edges of thee-rm blanks into substantial engagement with each other.

In testimony whereof, Iliave hereunto subscribed my name this 26th day of June, 1926.

' Manson 

